Primary yaws is manifest as a large yellow papule or papillomata at the site of inoculation. Papules are highly infectious (top). This image shows the buttocks of a girl with primary yaws. Primary yaws lesions may also develop a crusted surface (bottom).

Top image courtesy of Dr. Peter Perine via the Public Health Image Library of the Centers for Disease Control and Prevention. Bottom image courtesy of K McLennon, Tulane University Medical School, via the Public Health Image Library of the Centers for Disease Control and Prevention.